Originally Posted by
RothwellAudio
No problem.
BTW, I had a snoop around his site and found this quote relating to a microphone preamp:
"The power supply is, uh, unconventional. What? Who? Me? Yup. A switching supply, generating 6.3V filament voltage and +200V B+ from a 48VDC input. The beauty of switching supplies is that the noise they generate - and yes, they do generate some noise - is at high enough frequency that it's easy to filter, and above the audible range. For a low-level preamp like this I'd rather have a few millivolts of 100kHz than a few millivolts of 60Hz!"
I agree entirely :) Hi frequency noise/ripple is easier to deal with than low frequency noise/ripple. I don't know why switching power supplies get so much stick in audiophile circles.